the powerfc has the logic and code built into the unit for the boost control kit
but you cant use it without the sensor, harness and solenoid
the menus are on the hand controller etc
the boost kit itself includes
an additional wiring harness
a map sensor
a boost solenoid
on the the side of the powerfc is a white socket, you plug the harness in there and plug in the map sensor and solenoid
so you dont have to do any wiring or splicing etc, just plug and pray
then set boost on the menu and duty and your done
the AVCR uses the same parts but has different controller logic
the avcr has boost scramble, boost gain etc and other features
but it uses the same sensor, harness, solenoid
you can mix and match them (the parts)